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- Beam_diameter abstract "The beam diameter or beam width of an electromagnetic beam is the diameter along any specified line that is perpendicular to the beam axis and intersects it. Since beams typically do not have sharp edges, the diameter can be defined in many different ways. Five definitions of the beam width are in common use: D4σ, 10/90 or 20/80 knife-edge, 1/e2, FWHM, and D86. The beam width can be measured in units of length at a particular plane perpendicular to the beam axis, but it can also refer to the angular width, which is the angle subtended by the beam at the source. The angular width is also called the beam divergence.Beam diameter is usually used to characterize electromagnetic beams in the optical regime, and occasionally in the microwave regime, that is, cases in which the aperture from which the beam emerges is very large with respect to the wavelength.Beam diameter usually refers to a beam of circular cross section, but not necessarily so. A beam may, for example, have an elliptical cross section, in which case the orientation of the beam diameter must be specified, for example with respect to the major or minor axis of the elliptical cross section. The term \"beam width\" may be preferred in applications where the beam does not have circular symmetry.".
- Beam_diameter wikiPageID "40780".
- Beam_diameter wikiPageLength "14453".
- Beam_diameter wikiPageOutDegree "22".
- Beam_diameter wikiPageRevisionID "693588572".
- Beam_diameter wikiPageWikiLink Antenna_aperture.
- Beam_diameter wikiPageWikiLink Beam_divergence.
- Beam_diameter wikiPageWikiLink Beam_parameter_product.
- Beam_diameter wikiPageWikiLink Camera.
- Beam_diameter wikiPageWikiLink Category:Antennas_(radio).
- Beam_diameter wikiPageWikiLink Category:Optics.
- Beam_diameter wikiPageWikiLink Centroid.
- Beam_diameter wikiPageWikiLink Charge-coupled_device.
- Beam_diameter wikiPageWikiLink Decibel.
- Beam_diameter wikiPageWikiLink Duma_Optronics.
- Beam_diameter wikiPageWikiLink Gaussian_beam.
- Beam_diameter wikiPageWikiLink Irradiance.
- Beam_diameter wikiPageWikiLink Laser_beam_profiler.
- Beam_diameter wikiPageWikiLink Lidar.
- Beam_diameter wikiPageWikiLink Light_beam.
- Beam_diameter wikiPageWikiLink List_of_laser_applications.
- Beam_diameter wikiPageWikiLink Microwave.
- Beam_diameter wikiPageWikiLink Standard_deviation.
- Beam_diameter wikiPageWikiLink Transverse_mode.
- Beam_diameter wikiPageWikiLink Wavelength.
- Beam_diameter wikiPageWikiLinkText "Beam diameter".
- Beam_diameter wikiPageWikiLinkText "D4σ or "second moment" width".
- Beam_diameter wikiPageWikiLinkText "beam diameter".
- Beam_diameter wikiPageWikiLinkText "beam width angle".
- Beam_diameter wikiPageWikiLinkText "diameter".
- Beam_diameter wikiPageUsesTemplate Template:Details.
- Beam_diameter wikiPageUsesTemplate Template:Redirect.
- Beam_diameter subject Category:Antennas_(radio).
- Beam_diameter subject Category:Optics.
- Beam_diameter hypernym Diameter.
- Beam_diameter type Fungus.
- Beam_diameter type Science.
- Beam_diameter comment "The beam diameter or beam width of an electromagnetic beam is the diameter along any specified line that is perpendicular to the beam axis and intersects it. Since beams typically do not have sharp edges, the diameter can be defined in many different ways. Five definitions of the beam width are in common use: D4σ, 10/90 or 20/80 knife-edge, 1/e2, FWHM, and D86.".
- Beam_diameter label "Beam diameter".
- Beam_diameter sameAs Q4876179.
- Beam_diameter sameAs m.0b54s.
- Beam_diameter sameAs Q4876179.
- Beam_diameter wasDerivedFrom Beam_diameter?oldid=693588572.
- Beam_diameter isPrimaryTopicOf Beam_diameter.